The Syntonic Principle by Harry Riley Spitler
Upcoming Events
Syntonic Phototherapy 101, Dec 13-14, 2025, in Southport, CT
Syntonic Phototherapy 101, Jan 30-Feb 1, 2026, in Poland
Syntonic Phototherapy Masterclass, Feb 15, 2026, Virtual
Syntonic Phototherapy 101, date TBD, 2026, in California
93rd International Conference on Light and Vision, May 28-30, 2026, in Virginia Beach, VA
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Our approach to evaluating and improving vision is based on the principle that vision is a learned process. Good vision is not just something we are born with. It must be developed.
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